Manchester City's Spanish coach Pep Guardiola sits on the bench before the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

(Credit: AFP/Getty Images / PAU BARRENA)

Barcelona's players celebrate a goal during the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

Manchester City's John Stones reacts after a missed chance to score during a Champions League, Group C soccer match between Barcelona and Manchester City, at the Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

(Credit: EPA / QUIQUE GARCIA)

Barcelona's Ivan Rakitic (R) and Gerard Pique (L) fight for the ball with Manchester City's Manuel Agudo 'Nolito' during the UEFA Champions League group C soccer match between FC Barcelona and Manchester City at Camp Nou stadium in Barcelona, Catalonia, Spain, 19 October 2016.

Barcelona's Argentinian forward Lionel Messi (R) celebrates a goal with Barcelona's Brazilian forward Neymar during the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

(Credit: AP / Manu Fernandez)

Barcelona's Lionel Messi fights for the ball next to Manchester City's Aleksandar Kolarov during a Champions League, Group C soccer match between Barcelona and Manchester City, at Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

Manchester City's Spanish coach Pep Guardiola (L) speaks with his players during the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

(Credit: AP / Manu Fernandez)

Barcelona's Luis Suarez fights for the ball during a Champions League, Group C soccer match between Barcelona and Manchester City, at Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

Barcelona's Lionel Messi gestures after scoring the opening goal during a Champions League, Group C soccer match between Barcelona and Manchester City, at the Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

(Credit: Getty Images / Alex Caparros)

Lionel Messi of FC Barcelona celebrates after scoring the opening goal during the UEFA Champions League group C match between FC Barcelona and Manchester City FC at Camp Nou on October 19, 2016 in Barcelona, Spain.

Barcelona's Croatian midfielder Ivan Rakitic (R) vies with Manchester City's defender John Stones (top) during the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

Barcelona's Croatian midfielder Ivan Rakitic (R) vies with Manchester City's defender John Stones (top) during the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

(Credit: AP / Francisco Seco)

Manchester City's John Stones jumps for the ball during a Champions League, Group C soccer match between Barcelona and Manchester City, at the Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

Manchester City's John Stones, left, controls the ball during a Champions League, Group C soccer match between Barcelona and Manchester City, at the Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

(Credit: AP / Francisco Seco)

The players of Barcelona and Manchester City pose together a Champions League, Group C soccer match between Barcelona and Manchester City, at the Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

(Credit: AFP/Getty Images / LLUIS GENE)

Manchester City's Chilean goalkeeper Claudio Bravo warms up before the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

Manchester City's Spanish midfielder David Silva kicks a ball as he warms up before the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.

(Credit: AP / Manu Fernandez)

Barcelona's Neymar fights for the ball against Manchester City's Nolito during a Champions League, Group C soccer match between Barcelona and Manchester City, at Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

(Credit: AP / Francisco Seco)

Manchester City's David Silva runs with the ball in front of Barcelona's Javier Mascherano during a Champions League, Group C soccer match between Barcelona and Manchester City, at the Camp Nou stadium in Barcelona, Wednesday, Oct. 19, 2016.

(Credit: AFP/Getty Images / PAU BARRENA)

Manchester City players warm up before the UEFA Champions League football match FC Barcelona vs Manchester City at the Camp Nou stadium in Barcelona on October 19, 2016.